<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        var obj = {
            id: "lisi"
        }
        /* bind改变了函数内部this指向,只是改变了函数运行的上下文环境不会马上执行 */
        // var fn = function(){
        //     console.log(this.id);
        // }.bind(obj)

        // fn();

        var go = function (a, b) {
            console.log(this.id);
            console.log(a + b);
        }
        // go.call(obj, 1, 2);      //lisi 3
        go.apply(obj, [1, 2])       //lisi 3
    </script>
</body>

</html>